He is described as white, around 5ft 9ins tall with dark hair and wearing a navy blue and white Timberland jacket, blue jeans, multi-coloured Nike Air Jordan trainers, black and red gloves, a navy blue tammy hat and a dark coloured hooded top with the hood up.

In addition, he was in possession of a black and red backpack and had dark-rimmed glasses on.

Detective Constable Mark Asquith from Dalkeith CID said: “While nothing was stolen from the premises, this was a frightening experience for staff. Thankfully, however, they were able to activate the emergency alarm, which forced the suspect to leave.